Natural selection
Natural selection and its evolutionary consequences provide a scientific explanation for each of the following except.
A) The fossil record
B) Protein and DNA similarities between different organisms
C) Similar structures among different organisms
D) A stable physical environment
D) A stable physical environment
Darwin concluded that the finches all shared a common ancestor but had developed different beak structures.
The different beak structures were most influenced by this.
What are selection for favorable variations?
Maple leaf beetles and willow leaf beetles are named for the type of tree where they live and reproduce. They look identical to each other when observed, but experiments have shown that willow beetles would starve before eating maple leaves. This is an example of specialization that would directly reduce...
A)Variation
B)Adaptation
C)Competition
D)Replication
C)Competition
Dinosaurs lived during this Era.
What is the Mesozoic Era?
Which statement is best supported by the theory of evolution?
a.) genetic alterations occur every time cell reproduction occurs
b.) the fossil record provides samples of every organism that ever lived
c.) populations that have advantageous characteristics will increase in number
d.) few organisms survive when the environment remains the same
c.) populations that have advantageous characteristics will increase in number
This factor could be the cause of the extinction in an animal species?
What is the inability of the species to adapt and change?
When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the island. The 14 varieties of finches are most likely the result of
A)Absence of biodiversity
B)Biological evolution
C)Asexual reproduction
D)Lack of competition
What is Biological evolution?
If an ecosystem is changed through a natural disaster, organisms will have the best chance of survival if
a.) their environment has few abiotic factors
b.) the organisms are large
c.) the population size is small
d.) their species exhibits genetic variation
d.) their species exhibits genetic variation
The Mesozoic era had this many time periods.
What is 3?
The time period of the humans.
What is quaternary?
This factor contributed to the mass extinction of many species.
What are significant changes in the environment?
Galapagos Finches evolved partly due to these two factors.
What are variation and competition?
When changes occur in the genes, these changes
1) lead to mutations in the parent organism
2) are always harmful to the offspring
3) can be the basis for evolutionary change
3) can be the basis for evolutionary change
This law says that the older fossils will be found in the deeper layers of the Earth.
What is the Law of Superposition?
This fossil is completely replaced by minerals.
What is a petrified fossil?
Extinction of a species could result from
a.) evolution of a type of behavior that produces greater reproductive success
b.) synthesis of a hormone that controls cellular communication
c.) limited genetic variability in the species
d.) fewer unfavorable mutations in the species
c.) limited genetic variability in the species
Beak structures differ between individuals of one species of birds. These differences most likely indicate this.
What is the presence of a variety of food sources
A species that lacks the variation necessary to adapt to a changing environment is more likely to do this.
What is become extinct?
This geological time period was had the mass extinction of Marine life.
What is the Permian?
This is the largest time span in geological time.
What is an Eon?
In several species of birds, the males show off their bright colors and long feathers. The dull-colored females usually pick the brightest colored males for mates. Male offspring inherit their father’s bright colors and long feathers. Compared to earlier generations, future generations of these birds will be expected to have a greater proportion of these.
What are bright-colored males?
The diversity within the wild bird species in the Galapagos Islands can best be explained by which process?
1) natural selection
In a certain area of undisturbed layers of rock, fossils of horseshoe crabs may be found in the upper layer, and a lower layer contains fossils of trilobites. Trilobites are extinct aquatic arthropods resembling modem horseshoe crabs. This information suggests that
What is horseshoe crabs may have evolved from trilobites?
During this era the first mammals appeared.
What is the Cenozoic?
This is the shortest geological time span.
What is an epoch?